At our Online School of Network Science, we have created a Network Scientist Tool Belt. This completely free resource is available for you to access, learn and add software and hardware tools to troubleshoot todays networks. You will just need to set up a free account, and the link will get you there. You will […]
The Network Scientists Tool Belt Read More »
Hi everyone! As many of you who have attended my conference presentations and Wi-Fi classes know, I spend time talking about the correct way of troubleshooting Wi-Fi networks. Power cycling or rebooting is NOT a first step. Here’s why: lets say you are having issues of some kind (slow speed, connectivity issues, can’t reach certain
Our Comprehensive Wi-Fi Troubleshooting Guide Read More »
As QUIC has emerged to begin its takeover of the Transport Layer (OK – we will never see TCP totally disappear), I have written multiple articles on QUIC. You can look them over here. In the early days Google made this really easy right within the Chrome web browser. As time has gone on and
Troubleshooting QUIC Traffic – Not Easy Read More »
Let’s start with some simple definitions of these protocols and how they work together. In Voice over IP (VoIP) to PSTN (telephone) network integration, MGCP and C15 can work together as part of a layered signaling architecture that bridges IP-based call control with traditional PSTN switching systems. Here’s how they fit and interact: MGCP (Media
Troubleshooting C15 and MGCP Protocols for VoIP Read More »
A recent discussion with several colleagues led to a discussion on how AI can be leveraged in the world of internetworking. With all the hype around AI, some pretty crazy things are being claimed by vendors, but looking under the surface requires specific solutions and, frankly, things become very vendor specific very quickly. I chose
How can AI be used in Networking? Read More »
Retransmissions of frames in WLANs (Wireless Local Area Networks) can become problematic for several reasons, primarily due to the nature of the wireless medium. While retransmissions are a necessary part of ensuring data integrity in unreliable networks, they can cause inefficiencies and degrade network performance. I will get to the details below, but let’s start
Recognizing WLAN Retransmissions is a Critical Skill Read More »
Service provider technicians need routine Wi-Fi skills training and they need to know how to troubleshoot Wi-Fi networks for several important reasons: Troubleshooting Wi-Fi networks is essential for service provider technicians to ensure reliable service, maintain customer satisfaction, and keep up with the fast-paced advancements in networking technology. Because the Wi-Fi network environment is ever
Why ISP Technicians Need Routine Wi-Fi Skills Training Read More »
Here is our second attempt at answering the question – we will call it Option 2. You can find the first article here. This question comes up all the time, and the answers can be quite varied. Seems simple enough at first glance, right? But the problem is that things are not simple, especially in
How to discover what is on your LAN (IPv4 and IPv6) or WLAN – Option 2 Read More »
Scenario Let’s say you have a DHCP server running on a Cisco Switch that is behaving strangely and you want to examine the traffic over a couple of hours while not creating a gigantic unmanageable capture file. A note here: I am doing this on a Cisco switch, but most all vendor switches support this
Troubleshooting Your Network Using Port Mirroring and Packet Capture Read More »
In this article, I wanted to provide a guide to using ping – ICMP Echo – to troubleshoot your network. Most people use ping on their platform to test if they can reach a given destination. Just open up a terminal (Linux or MAC OSx) or command line (Windows: Start> Run> cmd) and enter the
Troubleshooting The Internet Using Ping (a.k.a. ICMP) Read More »
This blog article is a culmination of my years of experience in the networking and computing worlds. Over those years, where I began as a bench and field technician, I have had a number of classes that my employers sent me to to teach troubleshooting skills. Usually termed with the words “logical troubleshooting” or something
A Dive Into Network Troubleshooting Read More »
In this article we will get you started with the iPerf tool. We will be using it in a Linux environment, but know that it is available for all systems at http://iperf.fr. iPerf is used to test performance, throughput, packet loss, and jitter on TCP/IP networks. iPerf defaults to testing TCP – port number 5002. iPerf
Getting started with iPerf – an illustrated step by step procedure Read More »
Just like out article on Network Management Tools (you can read/view that list here), I wanted to compile a list of Networking Utilities and Tools in this article. These are software programs. All these tools can be essential to troubleshooting network issues, as well as learning how the network works. If you are looking for
Networking Utilities and Tools Read More »
As explained in our prior article on QUIC, you may be seeing a lot of QUIC traffic in your packet captures. Assuming you have read that article, and understand that all QUIC traffic is encrypted, you know the only way was to see some of the details is using Chrome itself. Today it means using
Using Wireshark to Analyze QUIC Traffic Read More »
Sometimes troubleshooting in Wireshark is easy-ish, you find a misbehaving protocol behavior or pattern or even a bad packet, sometimes it is tricky and takes a while to find something, and sometimes it is as clear as mud. Check out these great references as well: Our custom profiles repository for Wireshark Our Udemy course on
Real-life Wireless Wireshark Troubleshooting Example Read More »
